我尝试了一些在这里和互联网周围发现的东西，但是我坚持了下来。我试图保存一种形式，该字段之一是foreignKey。问题是我想输入一个charField，所以如果组名不在数据库中，则创建它并保存表单。
我的模特
Classifier和form.py
from django.db import models
from django.utils import timezone
import datetime
# Create your models here.
class Ideas_Group(models.Model):
category_text = models.CharField(max_length=30, unique=True)
# votes = models.IntegerField(default=0)
def __str__(self):
return self.category_text
class Idea(models.Model):
idea_title = models.CharField(max_length=30)
idea_text = models.CharField(max_length=200)
idea_repo = models.URLField(max_length=80, blank=True, null=True)
idea_owner = models.CharField(max_length=30, blank=True, null=True)
idea_status = models.CharField(max_length=30, blank=True, null=True)
pub_date = models.DateTimeField('date published', auto_now_add=True)
group = models.ForeignKey(Ideas_Group, on_delete=models.CASCADE)
def __str__(self):
return "%s by %s => %s" % (self.idea_title, self.idea_owner, self.idea_text)
def was_published_recently(self):
now = timezone.now()
return now >= self.pub_date >= now - datetime.timedelta(days=1)
和views.py
class IdeasForm(forms.ModelForm):
idea_title = forms.CharField(widget=forms.TextInput(attrs={
'class':'form-control',
'placeholder':"do you have a name for your idea",
'aria-describedby':"basic-addon1",}))
idea_text = forms.CharField(widget=forms.Textarea(attrs={
'class':'form-control',
'placeholder':"what s the idea man",
'aria-describedby':"basic-addon1",
'rows':"10"}),
max_length=200,)
group = forms.CharField(widget=forms.TextInput(attrs={
'class':'form-control',
'placeholder':"Category",
'aria-describedby':"basic-addon1",}))
group_new = forms.CharField(widget=forms.TextInput(attrs={
'class':'form-control',
'placeholder':"Category",
'aria-describedby':"basic-addon1",}))
idea_repo = forms.URLField(widget=forms.URLInput(attrs={
'class':'form-control',
'placeholder':"repo",
'aria-describedby':"basic-addon1",}),
required=False)
#def __init__(self, *args, **kwargs):
# super(IdeasForm, self).__init__(*args, **kwargs)
# self.fields['group'].required = False
#idea_repo.widget.attrs.update(
class Meta:
model = Idea
fields = ('idea_title',
'idea_text',
'group',
'idea_repo',)
#def clean(self):
# # group = self.cleaned_data.get('group')
# group = Ideas_Group.objects.get_or_create(
# category_text=self.cleaned_data.get('group0'))
# self.cleaned_data['group'] = group
# return super(IdeasForm, self).clean()
def save(self):
self.cleaned_data['group'] = group
return super(IdeasForm, self).save()
最好的方法是什么？
更新： 我将save（）更改为与this link中的示例一样近，但是仍然无法正常工作。
def post(self, request):
if request.method == 'POST':
# create a form instance and populate it with data from the request:
form = IdeasForm(request.POST, instance='Ideas_Group')
# check whether it's valid:
if form.is_valid():
#ideapost = form.save(commit=False)
#ideapost.pub_date=timezone.now()
print(form.cleaned_data['group'])
#grp = form.cleaned_data['group']
#ideapost.group = form.cleaned_data.get('group')
#ideapost.save()
form.save()
latest_ideas_list = Idea.objects.order_by('-pub_date')[:6]
paginator = Paginator(latest_ideas_list, 10)
latest_ideas_pages = paginator.page(1)
context = {
'latest_ideas_list': latest_ideas_list,
'ideas_list': latest_ideas_pages,
'form': IdeasForm(),
}
return render(request,
self.template_name,
context)
且跟踪为：
def save(self, commit=True):
group, created = Ideas_Group.objects.get_or_create(
category_text=self.cleaned_data.get('group'))
print(11111)
self.cleaned_data['group'] = group.id
#self.group = group_new.id
print(222222)
return super(IdeasForm, self).save(commit)